Erasing shield



Patented Aug. 7, 1934 Fred H. Gibson, Westwood, N. J. Application'0ctober 19, 1933, Serial No. 694,295;

5 Claims.

I This invention relates to erasing shields and has for an object to provide a construction which will permit correct erasures to be made and at the same time prevent marking and offsetting on the carbon sheets.

Another object of the present invention is to provide an erasing shield wherein there is provided an upper and lower member so formed that by grasping it with one hand the lower membermay be slid between the top sheet and the back of the carbon sheet, while the upper member which is perforated is slid over the matter to be erased, whereby all parts of the typewritten sheet are protected except that which is to be acted upon by the eraser and at the same time the pressure on the eraser is not transmitted to the carbon sheet.

An additional object of the invention is to provide an erasing shield wherein an upper and a lower structure are provided and connected together in a manner presenting a pinching structure at one'end, whereby when the erasing shield is in operative position one edge of the paper is pinched and the eraser shield is held against accidental shifting,

A still further object of the present invention is to provide an erasing shield for making erasures on typewritten sheets wherein an apertured slide is presented capable of ready movement across the sheet at any time while being held in line with the matter to be erased.

In the accompanying drawing- Figure 1 is a perspective view of an embodiment of the invention shown in use;

Figure 2 is a top plan view of the shield shown in Figure 1, a portion being broken away for illustrating certain detailed features;

Figure 3 is a longitudinal sectional view through Figure 1 approximately on the line 3-3;

Figure 4 is a top plan view similar to Figure 2, but showing a slightly modified structure;

Figure 5 is a transverse sectional view through Figure 2 on the line 55, the same being on an enlarged scale;

Figure 6 is a view similar to Figure 5 but showing a modified construction of the invention; a

Figure 7 is a fragmentary top plan view on a reduced scale showing one end of a slightly modified structure to that illustrated in Figure 2;.

Figure 8 is a sectional view through Figure 7 on the line 8-8, the same being on an enlarged scale.

Referring to the accompanying drawing by numerals, 1 indicates a typewriter of any desired, kind into which a number of sheets of papers 2, 3 and 4 are inserted. Between the sheets of paper sheets of carbon 5 and 6 are arranged. This structure is the .usual structure now in common use where two carbon copies are to be made. During the typewriting operation it is not unusual for the operatorto strikea Wrong letter and when this occurs a correction must be made. Occasionally a wrong word is used or an incorrect spelling and when this occurs the wordmust be erased and the correct one substituted. To do this it has been the practice to use a shield held by hand for protecting all the typing except that to be erased. As the erasing requires some considerable pressure it is customary to place another sheet of paperor ablotter either in front or in backof one or both of the carbon sheets so that there will be no smearing or offsetting .of the carbon. In the present instance the shield obviates the use of a blotter or other sheet material placed in front or back of the carbon sheets As illustrated in Figures 2 and 3 there is pro-v vided an upper plate 7 and a lower plate 8, said lower plate havingya portion 9 extending beyond the upper plate as shown at the right in Figure 2. These plates are formed. from a single sheet of material or, if desired, are rigidly secured together, though as illustrated in the drawing they are formed of the same sheet and bent at points 10 and 11 so that the portion 12 may act as a handle. Thematerial of which the respective plates are made may be metal, celluloid or other comparatively stiif flexible substance. Y e

As the upper and lower plates are connected together only at point 10, if 'the upper plate is grasped at points 13 and 14, as indicated by the hand in dotted lines in Figure 1, and then lifted, plate 8 will swing downwardly a short distance whereby the extension 9 may be inserted beneath sheet 2 and over the back of the carbon sheet 5. Preferably the device is forced over sheet 2 until it is somewhat pinched at point'l5 where the plates 7 and 8 approach v each other. This pinching action is only slight but it acts to hold the device in the proper place on sheet 2.

Plate 8 is preferably smooth and unperforated, though below points 13 and 14 it is provided with cutaway portions 16 and 17, whereby when the plate is grasped at the points 13 and 14 the fingers will not grasp plate 8. The upper plate 19 is preferably provided with two rows of apertures in an irregular manner whereby an I apertured erasing opening is presented for all contingencies. Plate 19 is slightly wider than the slot 18 so as to underlap the same, as indicated' by the. dotted lines inFigure l," However, this plate is formed with overlapping ears 21 which slide over the upper surface of. plate 8, said sliding action being caused by the operator grasping the handle 22 and moving the sliding plate tothe desired position. When the device is applied as shown in Figure 1 none of the apertures 23 may be in the right position. .Consequently the sliding plate may be moved. by means of the handle 22 sothat an aperture will be correctly positioned over the place to beerased.

If the erasureshculd be longer than the aperture usedthe'sliding,plate 19 may' be shifted slightlyso" as to-make the additional erasure.

In connection with the sliding plate 19'- it will be'seen that in the structure shown in Figure 4 the sliding p1ate19 is provided with only a single row of apertures '23; When this is the case the entire device must be shifted upwardly or downwardly to secure a proper alignment,

7 but in the preferred form'if the lower line' of apertures are not properly set the upper one will fit or possibly one of the irregularly positionedopenings. It will be understood that one, two or more rows of apertures may be provided-without departing from the spirit of the invention and that they may be arranged in various ways, though ordinarily two rows parallel to each other are provided, said rows being spaced apart equally to a single spacing in the typewriter. In addition, preferably some transverse openings as, for instance, aperture 23, are provided tingencies.

to take care of unusual con- The plates 7' and 8 are madeof very thin material and the slide 19 is also made of very thin material'as shown in Figure 5. In Figure 6 a slightly modified structure is shown wherein the plate '7 is provided with longitudinally positioned raised portions 24, said raised portions permitting slideways or cavities for the sliding plate 19, thus permitting the ears 2l'to fit over the raised portions and the bottom of the plate 19 to be fiush with the bottom of plate 7. After an erasure on the'first sheet has been accomplished the same action'is carried out for the second andth-ird sheets, and as the device may be readily slipped in place and slide 19 adjusted, quick erasures may be made without any danger of producing any offsets'on the carbon.

manipulated.

and forth in a similar manner to that shown in; Figure 2- and, in addition, may move, so as toextend beyond the extension 9 so that any desired aperture 23 or 23 may be used at the end or beyond the end of plate 8.

1-. erasing shield comprising a pair of thin flexible plates connected together at one end, one of saidxplates having notches near the end whereitis connected to the other plate whereby when said other pl'ate'is grasped adjacent said notches said notched plate will swing a short distance below the plate held by the hand,

whereby the" notched plate may be readily slipped beneath a sheet-oi paper, the plate grasped by the hand being'formedwith an opening'for exposing the matter to be erased.

2. An erasing shield including a pair of thin flexible plates, said plates'being superposed with one of the respective ends connected together permanently, one of'said plates acting as a protecting plate and the other as a shield member, the plate acting as a shield'member having a longitudinally positioned slot and a slide arranged in said slot. v

'3. An erasing shield including 'a bottom plate, a topplate having a slot extending longitudinally thereof, and an apertured slide arranged in said 1 ping the plate, a handle extending from one end of said slotted plate whereby the plate may be '5'. An erasure shield usedin erasing matter from paper in typewritingmachines, including a pair 05 thin flexible plates, said plates being superposed with one of the respective ends connected to the other, one of said plates being adapted to be inserted-beneath the sheet, of paper to be corrected on the typewriter, and the'other above the sheet, the last mentioned plate being formed witha longitudinally positioned slot whereby the plate will be substantially'rectanguedges underlapping said plate and ears overlap- H5 lar, said upper plate being swingable in respect to the lower plate FREDH. GIBSON. 

